Intake Horn

[GTop]

Today I just finished up installing Autometer boost and EGT on the A pillar. The only thing left to do is find a source for boost. From searching the old posts I've decided it seems best to tap the intake horn. I definately want to remove the intake horn when I tap it so i'm sure there's no shavings left.



Now for my question, does anyone know what the bolts should be torqued to when I reinstall or are you guys just snuggin them down? Thanks

 

[BarryG]

Not sure on the torque but I remember seeing a thread that said Peirs has direct replacement bolt for the Horn that a boost sensor screws right into just swap in the bolt and your ready to go. Might check out his website. Sorry don't remember the address.

 

[Larry Willard]

Another possibility is to remove the 3/4 pipe plug behind the fuel filter and get a bushing to reduce it to a 1/8 mip x barb and attach your boost line to it, assuming you have 1/8 inch tubing.

 

[chuck3]

Mine is in the plug Larry is talking about and works great, no drilling and taping involved.

 

[GTop]

I was also considering using the 3/4 plug but have read posts on erratic gauge readings. Guess it 6 one way half a dozen the other?

 

[chuck3]

I have read that too, but mine and two friends of mine all have it done that way and they are rock steady, never seen any bouncing at all.

 

[pnwradar]

I put my SPA sensor in that plug as well. It was awfully jumpy at first, but when I made better electrical connections at the sensor, it became quite steady.



-jon-

 

[barryg41]

You should torgue the bolts to 18 ft. lbs. This is by the 96 bible and someone has borrowed my 99. This is for a 8mm body which fits a 10mm socket. It doesnt matter which steel class it is.



Just for the record I drilled and tapped my intake horn.

 

[Spooled-up]

Just installed my Boost gauge a few days ago...

I thought about tapping the intake, but decided to use the 3/4" plug just aft of the fuel filter. I figured if it read erratically, I could put the plug back in and tap the intake. It reads rock steady.



If you do use the 3/4" to 1/8 intake adapter, You'll have to file the sharp corners of the hex head off. They interfere with the sides of the rounded opening just above the plug. It's pretty tight in there, but there's another plug aft of the one behind the fuel filter that you might be able to get to a little easier. Just use a 1/2" drive extension to get the plug out.

 

[BarryG]

Not positive but i think the second plug aft is a coolant galley and pull the plug and you get coolant running out.

 

[Spooled-up]

You might be right Barry G. I didn't remove the plug myself, but it looks identical to the plug just aft of the fuel filter.

 

[azcummins]

If you look right infront of the turbo where your wastegate hooks in, replace that fitting with a T fitting where one side is for your waste gate, other side goes to your boost gauge. I did it this way and I have no problem with erratic readings or having to file fittings.

 

[dresslered]

Tap the horn and torque as barryg41 says.

 

[GTop]

Thanks for all the suggestions and help. I've decided to go a little differn't route and ordered the boost gauge fitting from Piers. Should hopefully be here by the middle of next week.